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Finding the Fourth Proportional to 19,306.78, 26,643.86 and 10,808.86

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Solution

The fourth proportional to 19,306.78, 26,643.86 and 10,808.86 is: 14,916.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,306.78 : 26,643.86 = 10,808.86 : x
  2. Step 2: Convert to fraction form
    19,306.78/26,643.86 = 10,808.86/x
  3. Step 3: Cross multiply
    19,306.78x = 26,643.86 × 10,808.86
  4. Step 4: Simplify right side
    19,306.78x = 287,989,752.60
  5. Step 5: Solve for x
    x = 287,989,752.60/19,306.78
  6. Step 6: Final answer
    x = 14,916.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.